Grinding-arbor adapter



Feb. 17, 1925. v 1,527,067

J. E. PARKER GRINDING ARBOR ADAPTER Filed Aug. 1B, 1922 ZShee'cs-Sheet l NLM. I 1 W N l m Q b 5;

V 'Y Q Q Q I I|1 I l 'Q I MMIII- :uw E Q Hnl||||| l Gx n "fzil mlm i l'l 31a/vento@ Feb. 17, v1925. 1,527,n67 J. E. PARKER GRINDI NG ARBOR ADAPTER Filed'Aug. 18,'1922 Stilo :neg

2 sheets-sheet 24 Patented Feb. 17, 1925.

1,527,067 ORF? l G Ef;-

Jo-HN .PAAR-Knielen HOWELL,` MroHieAm Assieivon fr COMPANY, Y, or HOWELL, MICHIGAN, A

.o Smm-istiewenn CORPORATION OF MICHIGAN..

GRINiJING-Anion ADAPTER.

Appiicatin-ld- August -18, 1922.--L seriali-No;- 582,590E-f To oMwho'mt may 'concern-.h-

Beb it known ythat LJI, efem- *PARK-En; citizen off-thel United-' 'Sta-tes;j of Amerie residing at Howell,- in'1 theountyofLrvmgston" andi-StattetoiMiehigga,l have invented certainl new yandfuseful Improvements-'finf Grinding-Arbor Adapters; o-lwhich thefole lowing is fa speeieetiongre-ereneebeing-had therein-"to: theaoeoiiipanying fdrfwingsrl- Tliisl invention frelatefs-h -to-r meansf-for sup-- portingxhollo'w fbodies betweenoeiters, and has t "speoialY 'reference toi-'f a centering'l #dev-lee and adapter --by `-"whieh i piston bodies-*and the like may be mounted betweeirth ecenterf members;VV chucksi f -or- "simi-lari devices i of the' headndtail smelt-oft lathe or other ina-- chine; whereby suohf'pi'sto'n loo-diesi mayi be supported forjaeeuratei grinding, trimming,-v facing or other-fperat'ions'* One of theobjeetsofmy invention Ais-to provide Aa selfeentering head which-maj1 belinserted in the-openend-'of a piston-body or the Alike-tol--eo-1re"otly `kposition-"an "arborl or sh'aft"axially1 rof the piston lbo'dvl" Another 'object of -th-isF-"invent-ion--is to"- pr'o'videfselff eentei'i-ng headEl or-inand-ril that 'oa'n be easil-ytandquiellvi mounted' Ain fa hollow member to seek a posit-ion-azziallyi thereof, -sa-id sel-n centeringi head ineludin'g a plurality *ofi -eireumferenti-a'llv 'disposed pivotedospring pressed members tha adj-listed"v lrelativ'eto' the head.' 1

A ifurther "obj eet fof Vthis invention is tof provide a grinding-arborand fa'dapterJbywhich piston-bodies'ifor -liollow 'members may be' expeditiously mounted betweenthe headA endl-'tail stocks of a lathe Vorsupports --of other `machines `to permit -o-f- Athe exterior oi"- thef-piston-bodiesbeing operatedupon by va'-' tive of anyexte'rior irregularities the grinds ing' arbor4 Vand adapter leorreotlyf lpositions thepiton 1bodies-forexteriral operations. The'l-aboveare a few^of`the =`objeots attained by-a simple* and 'dur-able-eonstriie-= tio-n to be hereinafter* des'ribed 'and elaimec-l, reference 1 will now #be had` to' the drawing),- wherein#` l Figure-ll is la 4Sideelevation-of the 4'sel-f" centering l-he'ad in' a pistoni-body' supported between oenteringgmembers;

Fig; 2 is ia detail view showingV how f -a pivoted-member-engages inY the piston body; Fig?) is an end view of the self centeringhead;

t nflajy-be"` comprises an arbor or shalt 4 having a Crank-- rious kinds of instrumentalitie'sandiri'espee- Fi-g. 4 is a lo-ngi-tudi-iial-seetionalviewfof@ "the same; l

Fig.--5 is ani elevation of-a -ldetaehed'-relftaining--ringgf-and ntering' member. In the-drawings,f=the refereneenumeralsf1S "and 2 denote-tentermembei'sliir opposedfr'el-'fl tion?v and *representingcenter v pieces; Chucks-, orvarious type-"sv oiiholdi-ng -orforip ing de- J *vices that-mayg to-iirii'-pa1t bt'head-- nd tail-ff stooks-of-'a lathe or vother -maehinethat iny i@be-fused for externalE operations on-la pieton- -bo'dy 3 orother hollow member-f'- halv-in'g fa il closedflend-adapted-'to be supported-by one-#70 of the center members l or '-2 and-'theopenlf' endof th'e VVpiston-botly-supportedt by! 'the-:- othler'centei member',r so Lth'alt l'piston *bodylmaybe revolved -andturned down, groove'd, -faced or otherwiseiopera-ted upon byf aninstru-mentalityf held-stationaryrelative t-othe `-revolving--pistonl-bodyf In-or'der -thtit 'thet- 3 piston' bodyL may be properly- Ce'nt'eied liela# tive to theaxis of the-icentei members-l and 2,`it is necessary that some'supportingmeas-80 be interposed between the-open Vendof-'the piston body and one'lofthe centerl members with l 'the supporting means] l"establisli'ii'igg" n rigid `connection f with th'e Z"piston" lbodv for 5 driving .-purposesi- The supporting-` vmeans'therein diselosed' rpm-l5 ladj-'imitant one end-'ndinthe'presentA -instanee the outer endet-'the arbofbrshz'itt 4 is supported by the eentermember andv` y"may be *revolved hva `driven member-em -gaging the era-nk jorpiir-, as isithfelusual practice.

Onthe inner end of the -ar'bo-ror shaft 't is a cylindrical head; G provided with' a collar 7 and 'a peripheral abut-nient f8. Tliehelad* f 6 'andthe collar thereof liave`^openings9 l with lthe --walls *th'ere'of'sorewthreaded' to" reoeive countersunk screws-"10 whieh engage the arbor-or shaft 4 Vand seourei'the head 6 ron-'said arbor or sha'ftf-Tlie*'eoliai*17 is f adapted to extend1 into' the open endot the' piston bodyl '3 with-the annulaifabtit'ment v8 bear-ingagainst the" "endfof the pisto-nbody, as best 'shown' in; Fig? l, -and with thev collar' 7 of less diameter than the inner diameter of "-the;piston body, sa'idl'eolla'r and'ft'he head t5 can "be centered-withinthe pistonbo'dy ln order-#thatlthis imay be accurately "aooomplished, the inner wall sof the piston "body,

Fig. 6 is a perspective View loia ydetached--60 lll) at its open end, is reamed, ground or otherwise operated upon to provide a smooth and uninterrupted annular wall 11 and at any desired point in this wall is a longitudinal slot or groove 12, the purpose of which will hereinafter appear.

The head 6 and the collar 7 are provided with a plurality of radially vdisposed lrerfs or slots 13 each communicating with a lon gitudinal bore 14 in the head 6 with the outer end of the bore interiorly screwthreaded to receive a regulating screw 15 and the inner end of the bore houses a coiled expansion spring 26.

In the kerfs or slots 13 are placed bell cranks or angular centering members 16 provided with notches 17 to receive a split retaining ring 18, said ring being mounted in an annular groove 19 provided therefor in the collar 7, and the split ends of the retaining ring 18 may be inturned, as at 20 and suitably anchored in the collar 7, as best shown in Fig. 3, to prevent circumferential shifting and displacement of the resilient retainingring. This retaining ring pivotally supports the centering member 16 relative to the head 6 with the inner ends of said members extending between the regulating screws 15 and the springs 26. The

expansive force of the springs 26 holds the inner ends of the centering member 16 against the inner ends of the regulating screws 15 and it is in this connection that these screws serve as adjustable abutments to limit the outward movement of the outer ends of the centering member 16 which outer ends protrude from the slots 13 contiguous to the peripheral abutment 8. The springs ,26 permit of the centering members 16 yielding when encountering the annular inner wall 11 of the piston body 3 and one of said centering members is adapted to engage in the slot or groove 12 of the piston body and thus form a snap to establish a driving relation between said piston body and the head 6. Since the centering members 16 may individually yield relative to the true annular wall 11 of the piston body il, it is obvious that the head 6 will be self centering relative to the wall 11 and by seeking a position therein a true and accu rate axis is established between the center members 1 and 2 about which axis the piston body 3 may be revolved so that peripheral operations performed on the piston body will be concentric of such axis.

I attach considerable importance to the fact that when my centering device is used in connection with a lathe that the center members land 2 need not be shifted for pieces ofwork of various lengths, as it is only necessary t0 loosen the screws 10 and sli'de the arbor or shaft 4 in the head 6 in order that the pieceof work may be correctly positioned or held between the center members.

Laarne? With these members preferably alining and 1. A grinding arbor and adapter com-' prisinga shaft, a head slidable on said shaft and adapted to be fixed thereon, and a plurality of pivoted tiltable members carried by said head and adapted to be snapped into engagement with a piece of work.

2. A grinding arbor and adapter as called for in claim 1, wherein said pivoted members for the inner ends thereof spring pressed and capable of being adjusted.

3. A grinding arbor and adapter as called for in claim l, wherein said pivoted mem bers are disposed circumferentially of said head, and set screws in the end of said head are adapted to limit the tilting of said members in one direction.

4. A grinding arbor and adapter as called for in claim 1, wherein said pivoted members are disposed circumferentially of said head, and a retaining ring holds said members in engagement with said head and serves as a pivot for said members.

5. Means' for supporting a piston body between center members, one of which is laterally engaged by the piston body, said means comprising a self centering head, a snap thereon adapted to be snapped into the piston body, and an arbor axiallyv of said head and adapted to be engaged by the other center member. y

6. Supporting means for a piston body, as called for in claim 5, wherein said self centering head includes a plurality of spring pressed members, one of which engages the` piston body to establish rotative continuity between said head and piston body.

7 Supporting means for a piston body, as called for in claim 5, wherein said self centering head includes a plurality of spring pressed members, and a set screw for each member to regulate the position of the member relative to said head.

8. Means for supporting a piston body between center members, one of which is engaged by the piston body, said means comprising a head adapted to abut the end of the piston body and be supported from the other center member, andk yieldable means carriedrby said head for engagement with the inner wall of the piston body to center said head in saidpistonbody.

9. Supporting means for a piston body, as called for in claim 8 wherein said yieldable means includes pivoted members set in said head, a ring retaining said member therein.

10. Supporting means for a piston body, as called for in claim 8, wherein said yield able means includes pivoted members, and adjustable abutments for said pivoted members.

1l. An adapter comprising a head, bell cranks having angular portions thereof pivotally supported relative to said head, and mea-ns disposed parallel to the axis of said head and engaging the inner ends of said bell cranks adapted to retain the outer ends of said bell cranks distended for a snap 10 action in entering a piece of Work.

In testimony whereof I aiiiX my signature in presence of two Witnesses.

JOHN E. PARKER. Witnesses:

OTTO F. BARTHEL, ARTHUR MTNNICK. 

